function ajax(){
    $.ajax({
        url: "/seed/user/err",
        type: "POST",
        async: false,
        success: function (data) {
            debugger;
            if (data.status === 200) {
                alert("success");
            } else {
                alert("发生异常:" + data.msg)
            }

        },
        error: function (response, ajaxOptions, thrownError) {
            alert(ajaxOptions+":"+ response.responseText);
        }
    });
}